(3fXGe GdChQGb GdJLGQjI (B/s - (3GdZQaI GdJLGQjI GdUfGYjI HeMGaXI LOI (B. (3GdEOGQI GdbGfhfjIs ((3LOI, GdSYhOjI (B: s (3GdZQaI GdJLGQjI GdUfGYjI, s, 1980)
Keywords: (3GdChQGb GdJLGQjI s -- (3GdSYhOjIs; (3GdSYhOjI s -- (3CMhGd GbJUGOjIs